docs: def ecef2nedv(x: float, y: float, z: float,
                lat0: float, lon0: float,
                deg: bool = True) -> Tuple[float, float, float]:
      """
      for VECTOR between two points
  
      Parameters
      ----------
      x : float or numpy.ndarray of float
          ECEF x coordinate (meters)
      y : float or numpy.ndarray of float
          ECEF y coordinate (meters)
      z : float or numpy.ndarray of float
          ECEF z coordinate (meters)
      lat0 : float
          Observer geodetic latitude
      lon0 : float
          Observer geodetic longitude
      deg : bool, optional
            degrees input/output  (False: radians in/out)
  
      Results
      -------
  
      (Vector)
  
      n : float or numpy.ndarray of float
          North NED coordinate (meters)
      e : float or numpy.ndarray of float
          East NED coordinate (meters)
      d : float or numpy.ndarray of float
          Down NED coordinate (meters)
      """
      e, n, u = ecef2enuv(x, y, z, lat0, lon0, deg=deg)
  
      return n, e, -u